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Wetsuits are used in a variety of water sports, for preserving and insulating body heat. Hugh Bradner is usually considered as the inventor of the modern day Wetsuit. The History of Wetsuits can not actually pinpoint the person who invented the first wetsuit, however, Bradner was an SIO physicist, and along with UC-Berkeley came up with the idea of using water to keep the body heat warmed. He knew that water was a better heat conductor than air.

The neoprene of the wetsuit contains small bubbles of nitrogen gas. Nitrogen gas has a very low thermal conductivity. This prevents the heat inside the wetsuit from escaping to the water outside of the wetsuit. If you were in the water without a wetsuit on, the heat from your body would escape to the water because the water has a very high thermal conductivity.

The wetsuit function is essentially to allow the water to come into the suit and form an insulating layer of water, held within the material, which is warmed up by the wearer’s body temperature. This insulating layer then serves to keep the wearer warm in the cold water conditions. Some people get confused between a wetsuit and a dry suit, the dry suit functions to keep the wearer dry, whereas the wetsuit allows the water into the material to then in turn to be heated up and retain an insulating layer of water to keep the wearer warm. The dry suit also seals out the water with rubber seals around the neck, ankles and wrists.

The use of a wetsuit is as important in scuba diving as an air tank. It is an essential piece of scuba gear. Choosing the appropriate wetsuit, however, depends upon many factors and preferences. For example, where will the dive be taking place? What will the water temperature be? What type of neckline or stitching do you prefer a wetsuit to have?

Another consideration that you might have, if you are concerned about staying warm, is how well your wetsuit fits on your body. If the wetsuit is too loose of a fit on your body, then the thin layer of water between your skin and the wetsuit might escape, along with some body heat. If the suit is not a close fit then cold water might rush into the suit, which prevents the water already inside the suit from warming up. If you use flexible seals around the openings near the feet, hands and neck, this might help keep the cold water out and the warm water in. You should choose a wetsuit that fits your body as tightly as possible, but it should not be so tight that it prevents you from having your full range of movement.

Another choice that needs to be made is the type of wetsuit that you will need. Wetsuits most commonly are found with short legs and sleeves and long legs and sleeves. The choice of which is right for you depends upon where you are diving, the temperature of the water and your personal tolerance level for temperature changes.

The water temperature will help you when making the decision regarding thickness and length of the wetsuit needed. If you are diving in water that is above 85 degrees, a 2 mm short suit is what you would need. However, if the dive is in water that is 60 to 70 degrees, look for a 6-7 mm long suit. The final decision regarding the thickness and type of suit that is best for you rests upon your own body characteristics.

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